what's a roblox co-op game you wish existed but doesn't?

been coding for 11 years, never touched Lua until now. figured it's time.

not trying to make another simulator or obby clone tbh. what's a co-op game on roblox you and your friends wish existed? doesn't have to make sense yet, just tell me the moment or the chaos you'd want. if something actually hits I'll try to build it, not just save the post and forget about it